CN1808633A - Composite ZnO film conductive powder and its preparation method - Google Patents
Composite ZnO film conductive powder and its preparation method Download PDFInfo
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- CN1808633A CN1808633A CN 200610049582 CN200610049582A CN1808633A CN 1808633 A CN1808633 A CN 1808633A CN 200610049582 CN200610049582 CN 200610049582 CN 200610049582 A CN200610049582 A CN 200610049582A CN 1808633 A CN1808633 A CN 1808633A
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Abstract
This invention discloses one compound ZnO film conductive powder and its process method, wherein, The conductive powder is to cover ZnO film on the mineral powder, glass microballs, ceramics particles or glass fiber surface; The method is to deposit ZnS film on the load surface and to burst it in air to convert it into conductive ZnO film to get the product with high conductivity and white color and good reflection rate with certain antibiosis effect; adding it to the plastic, rubber and coating to make high reflection rate and conductivity with static conductor and electromagnetic shield with large utility range of electron, appliance, aviation, coating, chemicals.
Description
Technical field
The present invention relates to a kind of composite ZnO film conductive powder and preparation method thereof.
Background technology
Conductive powder body is a kind of functional material, mainly as the packing material of macromolecular material (comprising electrically-conducting paint), makes macromolecular material have functions such as conductivity, antistatic, shielding electromagnetic wave.Conductive powder body generally can be divided into carbon system (carbon black, carbon fiber, graphite), metal series (metal dust, sheet metal, metallic fiber) and metal oxide series.
Along with fast development of social economy, the range of application of macromolecular materials such as various plastics, fiber, rubber, coating enlarges day by day.These materials are owing to be subjected to easily generation static such as friction, bump, and static focus be to a certain degree will causing discharge, even may puncture integrated circuit or cause fire.For preventing or eliminate static, will in plastics, rubber, fiber, coating, add conductive powder body, make it have functions such as conduction, antistatic, thereby eliminate the harm that static brings.Conductive powder body is widely used in fields such as electronics, electrical equipment, aviation, coating, chemical industry, printing, packing, boats and ships.Can be used for producing electrically-conducting paint, antistatic coating, conductive plastics, conductive rubber, conduction static paper, electronic component, electrical equipment shell, printed circuit board etc., also can build dust free room and electro-magnetic screen layer.The core technology of electromagnetic shielding material is a conductive powder body.Along with the raising that electromagnetic shielding is required with people of improving of China's electromagnetic radiation protection standard, the market capacity of electromagnetic shielding material also has and increases substantially.
The carbon black cost is lower in the conductive powder body that uses at present, uses the extensivelyst, but its electric conductivity is not good enough, and cohesiveness is very strong between the particle, is difficult to and other material evenly mixes.Carbon fiber cost height, processing difficulties; The performance of graphite changes bigger because of the place of production is different, and is difficult to pulverize.Costing an arm and a leg of bronze and silver powder, oxidation easily such as copper powder, nickel powder, aluminium powder, and cause even conduction of electric conductivity decline after the oxidation.Metal oxide series conductive powder body performance is not so good as carbon system and metal series, and expensive.Exploitation function admirable and stable, cheap conductive powder body have important economic implications.
Summary of the invention
The purpose of this invention is to provide a kind of composite ZnO film conductive powder and preparation method thereof.
Composite ZnO film conductive powder of the present invention is the carrier particles that a kind of surface has coated ZnO film.
Said carrier particles is native oxide, hydroxide, silicate mineral powder, or commercially available glass microballoon, ceramic particle, staple glass fibre, their common feature is that chemical property is stable, is white in color, granularity is heated to 600 ℃ and does not melt below 10 microns.
The preparation method of this composite ZnO film conductive powder may further comprise the steps:
1) water of 1 part of weight support powder and 3～10 parts of weight mixes, add the zinc salt that contains 0.01～0.05 part of zinc, amount by 5～10 milligrams in every premium on currency adds suspending agent, the amount of every premium on currency 0.1～1 gram adds dispersant, be stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) splash into ammoniacal liquor in the suspension ore pulp, make the pH value rise to 9～10.5, add and contain 0.01～0.05 part of sulphur, concentration is the thiourea solution of 0.1～1M, slowly stirs, and makes carrier particles keep suspending, and reacts 2～5 hours;
3) with press filtration of suspension ore pulp or centrifugal dehydration and clean 2～5 times, again the dispersant that adds 3～5 parts of water and 0.005-0.01 part, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder obtains composite ZnO film conductive powder 450～600 ℃ of temperature lower calcinations 2～5 hours.
Said zinc salt is one or more in zinc chloride, zinc sulfate, zinc nitrate and the hydrate thereof, said suspending agent is that molecular weight is 1,200 ten thousand～3,000 ten thousand Sodium Polyacrylate, said dispersant is a sodium phosphate trimer, tetrasodium pyrophosphate, one or more in the sodium lignosulfonate.
The present invention is a carrier with natural minerals, glass microballoon, ceramic particle, staple glass fibre, adopt chemical coprecipitation that the ZnS film is coated on mineral surfaces, be converted into ZnO film after the calcining, products obtained therefrom conductance height, color is pure white, be added on and can make it have high reflecting rate and high conductivity in plastics, rubber and the coating, be suitable for as electrostatic conductor and electromagnetic shield, and occasion such as reflective traffic sign.It has extensive use in fields such as electronics, electrical equipment, aviation, coating, chemical industry, printing, packing, boats and ships.Can be used for producing electrically-conducting paint, antistatic coating, conductive plastics, conductive rubber, electronic component and electrical equipment shell, printed circuit board etc.In addition, this powder color is pure white, has certain antibiotic effect concurrently, is added on the housing that is suitable for making home electric in the plastics.Compare with metal series conductive powder body with existing carbon system, the conductive powder body that the present invention proposes has higher cost performance and application fields more.
Embodiment
The superfine powder of native oxide, hydroxide and silicate mineral, and glass microballoon, ceramic particle and staple glass fibre all are the customary filler of plastic material, the carrier of these powders as ZnO can effectively be reduced cost, improve the competitiveness of product in market.
Be suitable for comprising: quartz, feldspar, nepheline, pyrophillite, dickite, kaolinite, galapectite, montmorillonite, rectorite, sepiolite, palygorskite, illite, talcum, serpentine, chlorite, sericite, bauxite etc. as the natural minerals of carrier, they can be the micron-sized powders that ultra-fine grinding obtains, and also can be to obtain micron-sized powder after wet separation is purified.Glass microballoon, ceramic particle and staple glass fibre product specification are more, should select for use granularity at the product below 10 microns.The common feature of these carrier materials is that chemical property is stable, is white in color, and granularity is heated to 600 ℃ and does not melt below 10 microns.
Preparation method's the first step is that carrier particles and zinc salt, suspending agent and dispersant are added water is mixed, makes finely dispersed suspension ore pulp.Can use high-shearing dispersion emulsifying machine,, make their formation monomers separated from one another so that overcome the cohesiveness between the mineral grain; Adding suspending agent is in order to delay the precipitation of particulate, to make it keep suspending in course of reaction; The effect of dispersant is to prevent that mineral grain from reuniting again, reduces the viscosity of slurry.The kind of zinc salt is unimportant, can be in zinc chloride, zinc sulfate, zinc nitrate and the hydrate thereof one or more.Suspending agent is that molecular weight is 1,200 ten thousand～3,000 ten thousand Sodium Polyacrylate, and dispersant is a sodium phosphate trimer, tetrasodium pyrophosphate, one or more in the sodium lignosulfonate.
Preparation method's second step is the Zn that makes in the solution
2+Form the ZnS precipitation, be coated on the carrier particles surface.Ammoniacal liquor is nertralizer on the one hand, also is Zn simultaneously
2+The complexing agent of ion.The thiocarbamide that adds slowly decomposes in alkaline solution, for the precipitation of ZnS provides S
2-Ion.The reaction that takes place in the solution can be expressed as:
Should grasp the reaction time according to ambient temperature, winter, required time was longer, and summer is shorter.
Reaction can be selected press filtration or centrifugal dehydration for use after finishing, and cleans 2～5 times to remove unprecipitated impurity.The effect that adds dispersant before making the suspension ore pulp again once more is to prevent that mineral grain from reuniting again, reduces the viscosity of slurry.Adopt spray drying process that the suspension ore pulp is carried out spray drying, can prevent the again reunion of layer silicate mineral in dehydration, products obtained therefrom is a kind of runny powder.Be applicable to that spray drying device of the present invention is routinely, technical is well-known.The gained powder at 450-600 ℃ of temperature lower calcination, is made the ZnS and the airborne oxygen reaction of powder surface to be converted into ZnO products therefrom is composite ZnO film conductive powder.
Further specify the present invention below in conjunction with instantiation.
Embodiment 1:
With the palygorskite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of palygorskite powder and 3 kilograms mixes, and adds 62.5 gram ZnCl
2, 15 millimole amounts are 1,200 ten thousand Sodium Polyacrylate and 0.3 sodium phosphate trimer that restrains, and are stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9, add the thiourea solution that 9.375L concentration is 0.1M again, slowly stir, make carrier particles keep suspending, reacted 2 hours;
3) with suspension ore pulp filter-press dehydration and clean 2 times, again the sodium phosphate trimer that adds 3 kg of water and 15 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 450 ℃ of temperature lower calcinations 5 hours, and obtaining with the palygorskite is the composite ZnO film conductive powder of carrier.
Embodiment 2:
With the montmorillonite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of montmorillonite powder and 5 kilograms mixes, and adds 100 gram ZnSO
4, the molecular weight that adds 30 milligrams is 3,000 ten thousand Sodium Polyacrylate, adds the sodium phosphate trimer of 7 grams, is stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 8L concentration is 1M again, slowly stir, make carrier particles keep suspending, reacted 5 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 5 times, again the sodium phosphate trimer that adds 25 kg of water and 50 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 600 ℃ of temperature lower calcinations 2 hours, and obtaining with the montmorillonite is the composite ZnO film conductive powder of carrier.
Embodiment 3:
With the sepiolite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of sepiolite powder and 10 kilograms mixes, and adds 115.9 gram Zn (NO
3)
2, the 50 millimole amounts that add are 1,200 ten thousand Sodium Polyacrylate, add the tetrasodium pyrophosphate of 5 grams, are stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9.5, add the thiourea solution that 2.6L concentration is 0.6M again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with suspension ore pulp filter-press dehydration and clean 3 times, again the tetrasodium pyrophosphate that adds 4 kg of water and 8 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 500 ℃ of temperature lower calcinations 3 hours, and obtaining with the sepiolite is the composite ZnO film conductive powder of carrier.
Embodiment 4:
With bauxite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of bauxite powder and 7 kilograms mixes, and adds 44 gram ZnSO
47H
2O, the molecular weight that adds 50 milligrams are 1,500 ten thousand Sodium Polyacrylate, add the sodium lignosulfonate of 3.5 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 2.1L concentration is 0.3M again, slowly stir, make carrier particles keep suspending, reacted 4 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 4 times, again the sodium lignosulfonate that adds 4 kg of water and 9 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 550 ℃ of temperature lower calcinations 3 hours, and obtaining with bauxite is the composite ZnO film conductive powder of carrier.
Embodiment 5:
With the galapectite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of galapectite powder and 6 kilograms mixes, and adds 55 gram ZnSO
4H
2O, the molecular weight that adds 60 milligrams are 1,200 ten thousand Sodium Polyacrylate, add the tetrasodium pyrophosphate of 6 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9.5, add the thiourea solution that 2.34L concentration is 0.4M again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with suspension ore pulp filter-press dehydration and clean 3 times, again the tetrasodium pyrophosphate that adds 4.5 kg of water and 5 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 450 ℃ of temperature lower calcinations 5 hours, and obtaining with the galapectite is the composite ZnO film conductive powder of carrier.
Embodiment 6:
With the illite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of illite powder and 8 kilograms mixes, and adds 136.5 gram Zn (NO
3)
26H
2O, the molecular weight that adds 60 milligrams are 3,000 ten thousand Sodium Polyacrylate, add the sodium phosphate trimer of 5 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10.5, add the thiourea solution that 2.8L concentration is 0.5M again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 5 times, again the sodium phosphate trimer that adds 3.5 kg of water and 5 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 450 ℃ of temperature lower calcinations 4.5 hours, and obtaining with the illite is the composite ZnO film conductive powder of carrier.
Embodiment 7:
With the kaolinite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of kaolinite powder and 9 kilograms mixes, and adds 84 gram ZnCl
2, the molecular weight that adds 70 milligrams is 1,500 ten thousand Sodium Polyacrylate, adds the sodium lignosulfonate of 7 grams, is stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 3.125L concentration is 0.4M again, slowly stir, make carrier particles keep suspending, reacted 4 hours;
3) with suspension ore pulp filter-press dehydration and clean 3 times, again the sodium lignosulfonate that adds 4 kg of water and 7 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 600 ℃ of temperature lower calcinations 3 hours, and obtaining with the kaolinite is the composite ZnO film conductive powder of carrier.
Embodiment 8:
With the talcum is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of talcum powder and 10 kilograms mixes, and adds 50 gram ZnSO
4, the molecular weight that adds 75 milligrams is 1,500 ten thousand Sodium Polyacrylate, adds the tetrasodium pyrophosphate of 7.5 grams, is stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 5L concentration is 0.5M again, slowly stir, make carrier particles keep suspending, reacted 5 hours;
3) with suspension ore pulp filter-press dehydration and clean 4 times, again the tetrasodium pyrophosphate that adds 5 kg of water and 7.5 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 500 ℃ of temperature lower calcinations 4 hours, and obtaining with the talcum is the composite ZnO film conductive powder of carrier.
Embodiment 9:
With the serpentine is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of serpentine powder and 5 kilograms mixes, and adds 115 gram Zn (NO
3)
2, the molecular weight that adds 30 milligrams is 2,000 ten thousand Sodium Polyacrylate, adds the sodium phosphate trimer of 5 grams, is stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9, add the thiourea solution that 5L concentration is 0.3M again, slowly stir, make carrier particles keep suspending, reacted 3.5 hours;
3) with suspension ore pulp filter-press dehydration and clean 2 times, again the sodium phosphate trimer that adds 3.5 kg of water and 10 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 500 ℃ of temperature lower calcinations 3.5 hours, and obtaining with the serpentine is the composite ZnO film conductive powder of carrier.
Embodiment 10:
With chlorite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of chlorite powder and 4 kilograms mixes, and adds 31.5 gram ZnCl
2, the molecular weight that adds 30 milligrams is 2,500 ten thousand Sodium Polyacrylate, adds the sodium phosphate trimer of 4 grams, is stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 3.2L concentration is 0.15M (sulfur-bearing 15 grams) again, slowly stir, make carrier particles keep suspending, reacted 2.5 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 5 times, again the sodium phosphate trimer that adds 4.5 kg of water and 9 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 550 ℃ of temperature lower calcinations 2 hours, and obtaining with chlorite is the composite ZnO film conductive powder of carrier.
Embodiment 11:
With the sericite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of sericite powder and 7.5 kilograms mixes, and adds 70 gram ZnSO
4H
2O, the molecular weight that adds 45 milligrams are 1,200 ten thousand Sodium Polyacrylate, add the sodium lignosulfonate of 8 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10.5, add the thiourea solution that 2.6L concentration is 0.3M (sulfur-bearing 25 grams) again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with press filtration of suspension ore pulp or centrifugal dehydration and clean 4 times, again the sodium lignosulfonate that adds 4 kg of water and 8 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 600 ℃ of temperature lower calcinations 3 hours, and obtaining with the sericite is the composite ZnO film conductive powder of carrier.
Embodiment 12:
With the pyrophillite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of pyrophillite powder and 8 kilograms mixes, and adds 182 gram Zn (NO
3)
26H
2O, the molecular weight that adds 50 milligrams are 1,500 ten thousand Sodium Polyacrylate, add the tetrasodium pyrophosphate of 6.5 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9.5, add the thiourea solution that 2.5L concentration is 0.5M again, slowly stir, make carrier particles keep suspending, reacted 3.5 hours;
3) with suspension ore pulp filter-press dehydration and clean 3 times, again the tetrasodium pyrophosphate that adds 3 kg of water and 6.5 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 600 ℃ of temperature lower calcinations 2.5 hours, and obtaining with the pyrophillite is the composite ZnO film conductive powder of carrier.
Embodiment 13:
With the glass microballoon is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of glass microballoon and 8 kilograms mixes, and adds 65 gram ZnSO
4(containing zinc 25 grams), the 60 millimole amounts that add are 2,000 ten thousand Sodium Polyacrylate, add the sodium phosphate trimer of 7 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 3L concentration is 0.5M again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with suspension ore pulp filter-press dehydration and clean 4 times, again the sodium phosphate trimer that adds 4 kg of water and 7 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 500 ℃ of temperature lower calcinations 3 hours, and obtaining with the glass microballoon is the composite ZnO film conductive powder of carrier.
Embodiment 14:
With the ceramic particle is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram ceramic particle and 5 kilograms mixes, and adds 84 gram ZnCl
2, the 50 millimole amounts that add are 1,200 ten thousand Sodium Polyacrylate, add the sodium phosphate trimer of 10 grams, are stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10.5, add the thiourea solution that 2.5L concentration is 0.5M (sulfur-bearing 40 grams) again, slowly stir, make carrier particles keep suspending, reacted 4 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 5 times, again add 5 kilograms the water and the sodium phosphate trimer of 10 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 600 ℃ of temperature lower calcinations 2 hours, and obtaining with the ceramic particle is the composite ZnO film conductive powder of carrier.
Embodiment 15:
With the quartz is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of quartz powder and 3 kilograms mixes, and adds 62.5 gram ZnCl
2, 15 millimole amounts are 1,200 ten thousand Sodium Polyacrylate and 0.3 sodium phosphate trimer that restrains, and are stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9, add the thiourea solution that 9.375L concentration is 0.1M again, slowly stir, make carrier particles keep suspending, reacted 2 hours;
3) with suspension ore pulp filter-press dehydration and clean 2 times, again the sodium phosphate trimer that adds 3 kg of water and 15 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 450 ℃ of temperature lower calcinations 5 hours, and obtaining with the quartz is the composite ZnO film conductive powder of carrier.
Embodiment 16:
With the feldspar is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of feldspar powder and 5 kilograms mixes, and adds 100 gram ZnSO
4, the molecular weight that adds 30 milligrams is 3,000 ten thousand Sodium Polyacrylate, adds the sodium phosphate trimer of 7 grams, is stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 8L concentration is 1M again, slowly stir, make carrier particles keep suspending, reacted 5 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 5 times, again the sodium phosphate trimer that adds 25 kg of water and 50 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 600 ℃ of temperature lower calcinations 2 hours, and obtaining with the feldspar is the composite ZnO film conductive powder of carrier.
Embodiment 17:
With the nepheline is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of nepheline powder and 10 kilograms mixes, and adds 115.9 gram Zn (NO
3)
2, the 50 millimole amounts that add are 1,200 ten thousand Sodium Polyacrylate, add the tetrasodium pyrophosphate of 5 grams, are stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9.5, add the thiourea solution that 2.6L concentration is 0.6M again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with suspension ore pulp filter-press dehydration and clean 3 times, again the tetrasodium pyrophosphate that adds 4 kg of water and 8 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 500 ℃ of temperature lower calcinations 3 hours, and obtaining with the nepheline is the composite ZnO film conductive powder of carrier.
Embodiment 18:
With the rectorite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of rectorite powder and 7 kilograms mixes, and adds 44 gram ZnSO
47H
2O, the molecular weight that adds 50 milligrams are 1,500 ten thousand Sodium Polyacrylate, add the sodium lignosulfonate of 3.5 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 10, add the thiourea solution that 2.1L concentration is 0.3M again, slowly stir, make carrier particles keep suspending, reacted 4 hours;
3) with the centrifugal dehydration of suspension ore pulp and clean 4 times, again the sodium lignosulfonate that adds 4 kg of water and 9 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 550 ℃ of temperature lower calcinations 3 hours, and obtaining with the rectorite ore deposit is the composite ZnO film conductive powder of carrier.
Embodiment 19:
With the dickite is the composite ZnO film conductive powder preparation method of carrier, may further comprise the steps:
1) water of 1 kilogram of dickite powder and 6 kilograms mixes, and adds 55 gram ZnSO
4H
2O, the molecular weight that adds 60 milligrams are 1,200 ten thousand Sodium Polyacrylate, add the tetrasodium pyrophosphate of 6 grams, are stirred to the agent dissolves of adding, and carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) in the suspension ore pulp, splash into ammoniacal liquor, make the pH value rise to 9.5, add the thiourea solution that 2.34L concentration is 0.4M again, slowly stir, make carrier particles keep suspending, reacted 3 hours;
3) with suspension ore pulp filter-press dehydration and clean 3 times, again the tetrasodium pyrophosphate that adds 4.5 kg of water and 5 grams, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder was 450 ℃ of temperature lower calcinations 5 hours, and obtaining with the dickite is the composite ZnO film conductive powder of carrier.
The invention provides a kind of composite ZnO film conductive powder and preparation method thereof.Used carrier is the common natural minerals or the raw material of industry, and cheap.The preparation method is easy, and equipment needed thereby is simple, and ZnO film combines with carrier firmly, does not have agglomeration between the powder granule, and is good with the macromolecular material compatibility, easily forms finely dispersed mixture.Products obtained therefrom conductance height, color is pure white, and being suitable for has extensive use as electrostatic conductor and electromagnetic shield in fields such as electronics, electrical equipment, aviation, coating, chemical industry, printing, packing, boats and ships.Can be used for producing electrically-conducting paint, antistatic coating, conductive plastics, conductive rubber, electronic component and electrical equipment shell, printed circuit board etc.Compare with metal series conductive powder body with existing carbon system, the conductive powder body that the present invention proposes has higher cost performance and application fields more.
Claims (6)
1. a composite ZnO film conductive powder is characterized in that it is to have coated ZnO film on the carrier particles surface.
2. composite ZnO film conductive powder according to claim 1 and preparation method thereof, it is characterized in that said carrier particles is native oxide, hydroxide, silicate mineral powder, or commercially available glass microballoon, ceramic particle, staple glass fibre, they are white in color, and granularity is below 10 microns.
3. composite ZnO film conductive powder and preparation method thereof is characterized in that it may further comprise the steps:
1) water of 1 part of weight support powder and 3～10 parts of weight mixes, add the zinc salt that contains 0.01～0.05 part of zinc, amount by 5～10 milligrams in every premium on currency adds suspending agent, the amount of every premium on currency 0.1～1 gram adds dispersant, be stirred to the agent dissolves of adding, carrier particles is uniformly dispersed, and makes the suspension ore pulp;
2) splash into ammoniacal liquor in the suspension ore pulp, make the pH value rise to 9～10.5, add and contain 0.01～0.05 part of sulphur, concentration is the thiourea solution of 0.1～1M, slowly stirs, and makes carrier particles keep suspending, and reacts 2～5 hours;
3) with press filtration of suspension ore pulp or centrifugal dehydration and clean 2～5 times, again the dispersant that adds 3～5 parts of water and 0.005-0.01 part, stir and make the suspension ore pulp, adopt spray drying process that the suspension ore pulp is carried out spray drying, the gained powder obtains composite ZnO film conductive powder 450～600 ℃ of temperature lower calcinations 2～5 hours.
4. according to described a kind of composite ZnO film conductive powder of claim 3 and preparation method thereof, it is characterized in that said zinc salt is one or more in zinc chloride, zinc sulfate, zinc nitrate and the hydrate thereof.
5. a kind of composite ZnO film conductive powder according to claim 3 and preparation method thereof is characterized in that said suspending agent is that molecular weight is 1,200 ten thousand～3,000 ten thousand Sodium Polyacrylate.
6. a kind of composite ZnO film conductive powder according to claim 3 and preparation method thereof is characterized in that said dispersant is a sodium phosphate trimer, tetrasodium pyrophosphate, one or more in the sodium lignosulfonate.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057658A (en) * | 2015-07-20 | 2015-11-18 | 常州市武进晨光金属涂料有限公司 | Leafing aluminum powder coated with modified film and preparing method thereof |
| CN110189869A (en) * | 2019-06-10 | 2019-08-30 | 江苏南瑞恒驰电气装备有限公司 | A method of inhibit GIS bus and GIL equipment electric power to damage using high permeability material coated conductor |
| CN114436320A (en) * | 2022-01-25 | 2022-05-06 | 青岛科技大学 | Preparation method of core-shell structure zinc oxide and zinc oxide obtained by preparation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1140480C (en) * | 2002-02-05 | 2004-03-03 | 中国科学院理化技术研究所 | Spherical and microporous composite zine oxide-SiO2 particles and preparing process and usage thereof |
| CN1305803C (en) * | 2005-05-13 | 2007-03-21 | 中国科学院上海硅酸盐研究所 | Prepn process of hollow zinc oxide balls with zinc powder as material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057658A (en) * | 2015-07-20 | 2015-11-18 | 常州市武进晨光金属涂料有限公司 | Leafing aluminum powder coated with modified film and preparing method thereof |
| CN105057658B (en) * | 2015-07-20 | 2017-06-20 | 常州市武进晨光金属涂料有限公司 | Flake aluminum of surface coating modification film and preparation method thereof |
| CN110189869A (en) * | 2019-06-10 | 2019-08-30 | 江苏南瑞恒驰电气装备有限公司 | A method of inhibit GIS bus and GIL equipment electric power to damage using high permeability material coated conductor |
| CN114436320A (en) * | 2022-01-25 | 2022-05-06 | 青岛科技大学 | Preparation method of core-shell structure zinc oxide and zinc oxide obtained by preparation method |
| CN114436320B (en) * | 2022-01-25 | 2023-12-05 | 青岛科技大学 | Preparation method of zinc oxide with core-shell structure and zinc oxide obtained by preparation method |
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